DENVER -- Alaska Gov. Sarah Palin was back in Colorado campaigning for the Republican ticket as early voting opened in the swing state.

Palin spoke in Colorado Springs Monday morning and in Loveland Monday afternoon. She was due in Grand Junction for a 7 p.m. event.

Palin was speaking in Loveland when a woman behind her on the stage unveiled a white Barack Obama T-shirt and started heckling Palin. When Palin spoke about Obama's plan to tax and spend, the woman and her friend yelled, "That's not true."

The Alaska governor did not acknowledge her at first. Palin supporters tried covering the woman up with "Country First" campaign signs and the women attempted to push them away. She was then forcefully removed from the bleachers.

"Maybe it makes more sense for security to keep her in here for a little bit so she can learn more from all of you," Palin said as the woman and her friend were escorted from the event.

"Now is not the time to experiment with socialism," Palin said at a rally at the Larimer County fairgrounds in Loveland. "Our opponent's plan is just more big government."

Palin also criticized Obama on energy, claiming, "Our opponents keeping saying, 'No, no, no' to the energy options out there."

When the crowd began chanting, "Drill, baby, drill," Palin responded: "You're right. Drill, baby, drill, and mine, baby, mine."

Supporters in Colorado Springs were asked to wear red in a show of support and about half of them did.

Palin began speaking at Security Service Field in Colorado Springs at 9:07 a.m., and introduced Hank Williams Jr., who sang the national anthem acapella. He then launched into a song that began with "The Left-Wing Liberal Media," sung to the tune of "Family Tradition."

The Republican vice presidential nominee repeated familiar themes at both events, citing John McCain's war record, his long service in the Senate and the campaign's emphasis on helping small businesses.

"Barack Obama claims that he will cut income taxes for 95 percent of Americans. But the problem with that claim is, 40 percent pay no income taxes at all. So how do you cut income taxes for people who don't pay them?" she said.

The crowd whooped in laughter.

"You have a choice between a politician who puts his faith in government and a real leader who puts his faith in all of you," Palin said. "It's a clear choice in a politician who believes in spreading the wealth around and a clear leader who believes in spreading opportunity."

The Republican vice-presidential candidate mentioned "Joe the Plumber" in her speech, saying he was the "real winner of last week's debate."

"Joe Biden says higher taxes are patriotic. Joe the Plumber said it sounded to him like socialism," she said.

Palin said the presidential race was close and would "come down to the wire," but she was confident that McCain would win.

"In this campaign, Colorado, there is only one man who has ever fought for you. He is the only man with the courage to keep on fighting for you and that man is John McCain," she said in concluding her 30-minute speech in Colorado Springs.

Palin was accompanied by her daughters, Piper and Bristol, and husband, Todd.

Women Still Have Mixed Feelings About Palin

"I didn't hear anything brand new, but we heard again what we wanted to hear," said Kelly Rotenberry, 47, who works in customer service and drove about 25 miles to hear Palin speak.

Some women who attended conceded that Palin has work to do to appeal to Colorado women.

A recent Quinnipiac University poll suggests a majority of likely female voters in Colorado say Palin is not qualified to be vice president. Just 37 percent said they had a favorable impression of her.

That poll was conducted Oct. 8-12 and had a margin of error of plus or minus 3 percent.

"It's really going to be a fight," said Ronda Ellis, 34, a registered nurse who noted many of her fellow nurses are bothered by Palin's opposition to abortion rights.

"A lot of them feel like, as a woman, how could she oppose this?" Ellis said.

"She's one of us," said Mimi Hailes, 51. "She's a Christian, and she's got my values, and I've got her values, and that's important to me."

Palin Says She's Against Robo-Calls

Palin arrived in Colorado Springs on Sunday evening after stumping in New Mexico. After stepping off the plane, she talked to reporters and indicated she wasn't fond of the automated campaign calls voters in Colorado have been getting this election season.

"If I called all the shots and if I could wave a magic wand, I would be sitting at a kitchen table with more and more Americans talking to them about our plans to get the economy back on track and winning the war and not relying on the old conventional ways of campaigning that include those robo calls, that include spending so much money on the television ads that I think is kind of draining out there," Palin said after she got off the campaign plane.

Voters in Colorado and other states have been receiving automated telephone calls from McCain's presidential campaign linking Obama with former Weather Underground leader William Ayers.

McCain spokesman Brian Rogers has said the calls are warranted because Ayers "raises serious questions about Barack Obama's judgment and also his candor with the American people about his record."

In last week's debate, McCain said he wasn't concerned about "an old, washed-up terrorist," when asked about negative campaigning.

Todd Palin, Biden To Speak At Events

Palin's husband, Todd, will make four campaign stops in western Colorado and Denver on Tuesday.

He'll appear at a Village Inn Restaurant in Glenwood Springs, the Eagle Diner in Eagle and the McCain-Palin campaign headquarters in Eagle on Tuesday morning. He'll be accompanied by former Republican Rep. Scott McInnis during those stops.

On Tuesday afternoon, Todd Palin will appear at a Bass Pro Shop in Denver.

U.S. Sen. Joe Biden will campaign in Greeley and Commerce City on Tuesday and will be in Pueblo and the Colorado Springs area on Wednesday. On Tuesday, Biden will speak at the University of Northern Colorado in Greeley and at Adams City High School in Commerce City.

Obama told 7NEWS he would be returning to Colorado before the election, but he didn't know exactly when.